SPECIFICATIONS When the supply main pressure exceeds 60 psi (413 kPa), an approved water pressure reducing valve and strainer shall be installed in the water service pipe near its entrance to the building to reduce the water pressure to 50 psi (345 kPa) or lower. Sill cocks and outside wall hydrants may be left on full main pressure at the option of the owner. For service water systems up to and including 2" (50mm) provi-sion shall be made to permit the by-pass flow of water around the valve back into the supply main when pressures, due to thermal expansion on the outlet side of the valve, exceed the pressure in the supply main. Pressure reducing valves with built-in by-pass check valves will be acceptable. Approved valves shall comply with ASSE 1003 - Watts No. 25AUB. By-pass valve assembly Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements, please contact Watts Technical Service. Watts Regulator Company, 815 Chestnut St., N. Andover, MA 01845. Tel: 978-688-1811; Fax: 978-689-6247.

25AUB-Z3

FEATURES Union inlet connection Integral stainless steel strainer Renewable seat module Bronze body construction Serviceable in line Bypass feature controls thermal expansion pressure High temperature resistant reinforced diapgragm for hot water. SPECIFICATIONS When the supply main pressure exceeds 60 psi (413 kPa), an approved water pressure reducing valve and strainer shall be installed in the water service pipe near its entrance to the building to reduce the water pressure to 50 psi (345 kPa) or lower. Sill cocks and outside wall hydrants may be left on full main pressure at the option of the owner. For service water systems up to and including 2" (50mm) provi-sion shall be made to permit the by-pass flow of water around the valve back into the supply main when pressures, due to thermal expansion on the outlet side of the valve, exceed the pressure in the supply main. Pressure reducing valves with built-in by-pass check valves will be acceptable. Approved valves shall comply with ASSE 1003 - Watts No. 25AUB. By-pass valve assembly Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements, please contact Watts Technical Service. Watts Regulator Company, 815 Chestnut St., N. Andover, MA 01845. Tel: 978-688-1811; Fax: 978-689-6247.

For service water systems up to and including 2" (50mm) provi-sion shall be made to permit the by-pass flow of water around the valve back into the supply main when pressures, due to thermal expansion on the outlet side of the valve, exceed the pressure in the supply main. Pressure reducing valves with built-in by-pass check valves will be acceptable. Approved valves shall comply with ASSE 1003 - Watts No. 25AUB. By-pass valve assembly Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements, please contact Watts Technical Service. Watts Regulator Company, 815 Chestnut St., N. Andover, MA 01845. Tel: 978-688-1811; Fax: 978-689-6247.